Musannaf Ibn Abi Shayba 3:5213

Waki’ narrated to us, Sufyan narrated to us, from Mansur, from Hilal ibn Yasaf, from Ibn al-Muthanna al-Homsi, from Ibn Abi Abza, from Ubadah ibn al-Samit, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "There will be upon you rulers, and things will occupy them away from the prayer until they delay it from its time. So, pray it at its time." A man said: "O Messenger of Allah, if I catch it with them, [should I pray]?" He said: "Yes, if you wish."